Gaya APA
Khalid, K, M. (2013).
Biografi khalifah Rasulullah: Abu Bakar, Umar, Utsman, Ali, Umar bin Abdul Aziz .
Jakarta:
.
Gaya MLA
Khalid, Khalid, Muhammad.
"Biografi khalifah Rasulullah: Abu Bakar, Umar, Utsman, Ali, Umar bin Abdul Aziz".
Jakarta:
,
2013.
Text.